Sectional culm.



lNo. 878,441.

PATBNTED FEB. 4, 1908.

J. S. WILSON.

SBGTIONAL CULM.

APPLICATION FILED MAR, 14, 1907.

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JAMES S. WILSON, OF SGRANTON, PENNSYLVANIA.

SE CTIONAL CULM.

Specification of Letters Patent.

Patented Feb. 4, 1908.

Application filed March 14| 1907. Serial No. 362,338

To all whom 'it may concern:

Be it known that I, JAMES S. WILSON, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Sectional Culms; and I do declare the following to be a full, clear, and exact description of the insidewise movement of the sections.

Another object is to produce interchangeable and reversible sections, and also to provide means for interlocking the sections at their ends in such a manner as to increase the air space, and, at the same time, prevent the scraper from dropping down between the ends of the sections.

With these objects in view the invention consists in the novel construction and combination of the grate bar and sections as will be hereinafter more fully set forth.

In the accompanying drawings which illustrate the invention, Figure 1 is a top plan view with two of the grate sections shown in dotted lines; Fig. 2 is a central longitudinal sectional view; and Fig. 3 is a bottom plan view ofl one of the sections.

Referring more particularly to the drawings, 1 indicates the grate bearing bar which may be of any desirable length and size and comprises two bars, 2 and 3, which are spaced apart by cross pieces, 4, and have their ends provided with the usual cross ieces, 5, for properly spacing them within t e furnace.

Removably seated upon the bars are a plurality of grate sections, 6, two being shown, which are rovided with the usual air spaces, 7, and each) one has its ends provided with projections, S, so spaced apart as to provide recesses for the reception of the c`orresponding lugs of the adjacent section. The lugs upon the opposite ends of the same section are so arranged as to cause the lugs at one end to be in alinement with the recesses at the other end, whereby the lugs of one section will always be in position for entering the recesses of the adjacent section, no difference which ends of the sections are thus placed, thereby rendering the sections interchangeable and reversible. In other words, the lugs of each end commence in alinement with one of the sides of the sections and terminate at a distance from the other side far enough to form a recess for the reception of the lug of the adjacent section, the lugsnpon the opposite ends being diagonally opposite each other.

The upper faces of the lugs are preferably slightly beveled or inclined downward as shown at 9, so as to cause the lip or extreme end of each lug to lie below the adjacent portion of the lugs of the other section when the sections are placed end to end upon the grate bar, thereby rendering it impossible for the scraper to engage with the ends of the lugs of either bar when being used for removing the ashes or any other purpose.

The under side of each section is provided with centrally located shoulders, or downwardly extending projections, 10, adjacent to its ends, preferably on the mid rib, 11, which are adapted to pass down upon opposite sides of two of the cross bars, 4, whereby longitudinal expansion of the sections is permitted Without permitting undue longitudinal movement of the section. To permit of this construction without destroying the reversibility of the sections, the lugs, 10,

are spaced from each end a distance equal to one-fourth of the entire length of the section, and the outer face of the end cross bar, 4, is the same distance from the outer end of the bar, and the distance between the inner faces of the two middle cross bars is just double that, or substantially the same distance apart as the two shoulders.

Located upon opposite sides of the center of the section, preferably near the ends and extending' inwardly from the side pieces, 12, of the section and upon the under side of one of the lateral ribs, 13, are shoulders, 14, which are adapted to pass down upon the outer side of the side pieces, 2 and 3, of the grate bar and thereby permit of any lateral expansion of the grate sections from the intense heat to which they are subjected, without permitting undue lateral movement of the section. The inner ends of the shoulders are preferably slightly inclined as shown at 15 for permitting the section being placed upon the bars, and, if desired, the inner faces of the shoulders, 10, maybe also slightly inclined as shown at 16 for permitting the ready engagement with the `cross bars, 4.

As above described it will be seen that by constructing the grate bar and the sections, as above described, a very complete and serviceable structure is secured which can be readily placed in position, and which will permit of the expansion of the sections Without vinterfering with their eHiciency or with the process of cleaning them by means of the ordinary scraper. In placing them in position any section will readily fit and coperate withany and all of the other sections, thereby permitting of the raipd assemblage of the parts in constructing the furnace originally, or in replacing any ofthe parts in case they should become broken or burned out.

Having described my invention, I claim:

1. In a culm bar, a grate bar provided with parallel side pieces .and cross bars therebetween, k'and grate sections thereon, each section being provided with shoulders at its ends, the central ones of which are adapted to engage with opposite faces of two of said cross bars and the lateral shoulders being adapted to engage With the outer sides of said side pieces.

2. In a culm bar, a grate bar provided with parallel side pieces and cross pieces therebetween, and grate sections thereon, each section being provided with a mid rib and depending side pieces and having shoulders adjacent to its ends, two of said shoulders being on the ymid rib and adapted to engage with the opposite sides of two of the said 4cross bars, and the other shoulders extending in- Wardly from the side pieces in position for engaging with the sides of said side pieces, the-engaging portions of said shoulders being inclined.

In testimony whereof I have hereunto set my hand in presence of `two subscribing witnesses.

JAMES S. WILSON. Witnesses:

CEAS. II, VVELLES, Jr., EVAN HOPKINS. 

